i asked our asia correspondent, rupert wingfield—hayes, who was in seoul, for his thoughts.f taiwan to the motherland, as he puts it, is inevitable, he absolutely means it. i think the question we all have — and i don't have an answer to it, to be honest, john — is when does he mean that and how does he intend to do it? his intentions, i think, are very, very clear — that he believes taiwan must be, as he would put it, reunified with the rest of china within his term or, at least, it has to happen before — before the 100th anniversary of the revolution in 20119. so, you know, that's the absolute sort of end date is 20119. i think there's also a growing realisation by the leadership in beijing that taiwan, in its democratic, open, free system of government, is never going to vote for that and, ultimately, that means china must be — and i think is — considering military options. and in addition to that, just look at what china is building in terms of its military capability, particularly its naval capability. but, of course, xijinping has seen his close associate russia gettin

rupert wingfield-hayes with cbs news partner, the bbc, was there. >> here in south korea we see them out on the field, on the crash site, inspecting the crash site behind me here. but the focus of the investigation is not going to be here. it is going to be on what are called the black box flight recorders are that are inside the plane in every commercial aircraft. those have been recovered. >> reporter: sunday morning the pilot reported a bird strike, aborted one landing and requested to land the opposite way. the plane's landing gear had not been deployed. it crashed into a concrete structure housing an airline landing system only about 800 feet from the runway's end. just this year the airport said its location should be removed. >> the passengers were killed by hitting a solid structure just over the end of the runway, where a solid structure should not be. >> reporter: as the world marks the turn of a new year, in south korea anger and anguish. from the families of victims simply driving them to tears and for answers. rmy inocencio, cbs news, london. >>> coming up, if you're sti